diff --git a/package/freeswitch/freeswitch.mk b/package/freeswitch/freeswitch.mk
index a7ed5970b2..bb8cfb2a06 100644
--- a/package/freeswitch/freeswitch.mk
+++ b/package/freeswitch/freeswitch.mk
@@ -158,6 +158,14 @@ define FREESWITCH_ENABLE_MODULES
 endef
 FREESWITCH_PRE_CONFIGURE_HOOKS += FREESWITCH_ENABLE_MODULES
 
+# mod_isac supports a limited set of archs
+# src/mod/codecs/mod_isac/typedefs.h
+ifeq ($(BR2_i386)$(BR2_mips)$(BR2_mipsel)$(BR2_mips64)$(BR2_mips64el)$(BR2_x86_64),y)
+FREESWITCH_LICENSE += BSD-3c (mod_isac)
+FREESWITCH_LICENSE_FILES += src/mod/codecs/mod_isac/LICENSE
+FREESWITCH_ENABLED_MODULES += codecs/mod_isac
+endif
+
 ifeq ($(BR2_PACKAGE_FREETYPE),y)
 FREESWITCH_DEPENDENCIES += freetype
 endif